“一题多解”可以开拓思路,提高思维的灵敏度,积累更多的解题方法和技巧,提升分析解决问题的能力。笔者以在教学过程中遇到的一道习题为例,谈谈自己的认识与体会。例题在光滑水平轨道上有两个半径都是r的小球A和B,质量分别是m和2m,两球心间距离大于L时,两球间无相互作用力;当两球心间距离等于 “A problem and more solutions ” can open up ideas, improve the sensitivity of thinking, accumulate more solutions to problems and skills, enhance the ability to analyze and solve problems. The author encountered in the teaching process of an exercise, for example, talk about their own understanding and experience. Example On a smooth horizontal orbit two small balls A and B of radius r are respectively m and 2m. When the distance between the two balls is greater than L, there is no interaction between the two balls. When the distance between the two balls is equal to